What is missed in the chopsticks/flatware discussion is that Western etiquette forbids the accepted use of chopsticks, which is used as a raking motion when food is not selectable as pieces. Observing Chinese and others eat small foods like rice, it is obvious that raising the bowl to the mouth and raking is the accepted method in the East.
I like chopsticks and do rake when the dish calls for it, but many Westerners are timid and cannot escape the half-use techniques that render chopsticks woeful for them.
Actually, the correct way to eat with chopsticks NEVER involves raking/shoveling motion. Trust me. There isn't a strict rule/custom against this, but if you really master the way of using chopsticks, then you should have no difficulty carrying bunches of rice/porridge to your mouth without resorting to raking. Also, raking/shoveling food with chopsticks are considered crude behaviour. Not impolite, not improper, just plain crude (i.e. uneducated/crude people).
For rice-based products, it lies in that East Asian people usually consume rice that is slighty sticky so that it could be picked up in small clumps without breaking apart. The same rice, when cooked appropriately with the right amount of water, will also result in porridge that are quite viscous they can be picked without flowing away excessively from the grasp but not clumpy to the point like polenta cooked with too little water.
In other words, those who use chopsticks properly can eat almost anything without shoveling/raking the food*. The type of food doesn't dictate how one uses chopsticks to eat. If you have difficulty taking food of all sizes and types with chopsticks, or have to eventually rake the food, your chopsticks form is bad.
*Exceptions only for:
- Liquids (like soups minus the solid bits or porridge watered down to an extreme degree),
- Food that are so fragile they easily crumble or break apart (like very soft silk tofu and very soft agar-agar),
- Food that have small and very loose particle consistency and don't form small lumps (like sesame, semolina, sorghum, quinoa, and finely ground peanuts).
Even for these food, people opt to using spoons (or for soups, when eating at home, simply slurp off the bowl). It's perfectly normal to use both spoon and chopsticks to eat in Asian countries. There should be no shame in using additional cutlery when needed.
Even then, my parents can pick every single sesame seed with a very pointy-ended pair of chopsticks.